116643531 has 16 divisors (see below), whose sum is σ = 159436800. Its totient is φ = 75827808.

The previous prime is 116643517. The next prime is 116643533. The reversal of 116643531 is 135346611.

It is not a de Polignac number, because 116643531 - 2⁶ = 116643467 is a prime.

It is a super-2 number, since 2×116643531² = 27211426648295922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (116643533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19885 + ... + 25073.

It is an arithmetic number, because the mean of its divisors is an integer number (9964800).

Almost surely, 2^116643531 is an apocalyptic number.

116643531 is a deficient number, since it is larger than the sum of its proper divisors (42793269).

116643531 is a wasteful number, since it uses less digits than its factorization.

116643531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5378.

The product of its digits is 6480, while the sum is 30.

The square root of 116643531 is about 10800.1634709851. The cubic root of 116643531 is about 488.6001012916.

The spelling of 116643531 in words is "one hundred sixteen million, six hundred forty-three thousand, five hundred thirty-one".